Table 2 Pearson correlation coefficient \(\textit{r}\) between different metrics of inspiratory effort, considering all observed breaths in individual patients (\(\hbox {mean} \pm \hbox {SD}\)), \(n= 43\) (and \(n=42\) where \(\textit{P}_{\mathrm{di}}\) is involved)
From: Surface EMG-based quantification of inspiratory effort: a quantitative comparison with Pes
\({\mathrm{ETP}}_{\mathrm{interc}}\) | \({\mathrm{ETP}}_{\mathrm{sel}}\) | \({\mathrm{PTP}}_{\mathrm{mus,EMG}}\) | \({\mathrm{PTP}}_{\mathrm{mus}}\) | \({\mathrm{PTP}}_{\mathrm{di}}\) | |
|---|---|---|---|---|---|
\({\mathrm{ETP}}_{\mathrm{di}}\) | \({0.74\pm 0.27}\) | \({0.89\pm 0.16}\) | \({0.89\pm 0.16}\) | \({0.84\pm 0.16}\) | 0.84 ± 0.16 |
\({\mathrm{ETP}}_{\mathrm{interc}}\) | – | \({0.86\pm 0.28}\) | \({0.86\pm 0.28}\) | \({0.79\pm 0.25}\) | 0.77 ± 0.26 |
\({\mathrm{ETP}}_{\mathrm{sel}}\) | \(\star\) | – | \({1.0\pm 0.0}\) | \({0.87\pm 0.09}\) | 0.86 ± 0.10 |
\({\mathrm{PTP}}_{\mathrm{mus,EMG}}\) | \(\star\) | \(\star\) | – | \({0.87\pm 0.09}\) | 0.86 ± 0.10 |
\({\mathrm{PTP}}_{\mathrm{mus}}\) | \(\star\) | \(\star\) | \(\star\) | – | 0.97 ± 0.05 |